A new or an existing persistent disk (PD) or a local ssd
attached to a VM instance.
This message has oneof_ fields (mutually exclusive fields).
For each oneof, at most one member field can be set at the same time.
Setting any member of the oneof automatically clears all other
members.
str
Name of an existing PD.
This field is a member of oneof_ attached.
device_name
str
Device name that the guest operating system will see. It is
used by Runnable.volumes field to mount disks. So please
specify the device_name if you want Batch to help mount the
disk, and it should match the device_name field in volumes.